Deuterium is an isotope of hydrogen of atomic weight 2.014 atomic mass units. the diatomic deuterium molecule has a bond length of 0.0742 nm. calculate the population of its first excited rotational state, relative to its ground state, at a temperature of 25 k.

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.